Question

flotation
a technique used to separate a substance that floats on another substance is called flotation.
for example, if sawdust and sand are stirred into water, the sawdust floats and the sand sinks. the density of sawdust and sand are different. this allows them to be separated when placed in water.
another example is if oil and water are stirred together. oil is insoluble in water. the oil will float on top of the water as it is less dense than the water.
flotation separates a mixture based on differences in density. a less dense component will float to the top of a liquid where it can be skimmed or poured off. a more dense component will sink to the bottom.
in the particle model, a denser substance has more closely packed particles. in general, solids are denser than liquids. an important exception is ice, which floats on liquid water.
question 6
steam distillation can be used to extract oils from eucalyptus leaves. the distillate contains both eucalyptus oil and water. describe how flotation could be used to separate this mixture.
summing up

Explanation:

Step1: Understand density - based separation

Eucalyptus oil is less dense than water. When the distillate (a mixture of eucalyptus oil and water) is placed in a container and left undisturbed, the eucalyptus oil will float on top of the water due to this density difference.

Step2: Separation method

Once the two - layer separation occurs (oil on top and water at the bottom), the floating eucalyptus oil layer can be carefully skimmed off the surface of the water layer using a suitable tool like a spoon or a pipette. Another option is to pour off the top - layer (eucalyptus oil) into another container, leaving the water behind.

Answer:

Place the distillate in a container and let it stand until the eucalyptus oil floats on top of the water due to its lower density. Then, either skim off the eucalyptus oil layer or pour it off into another container, leaving the water behind.